A firm offers terms of 2/15, net 40. What effective annual interest rate does the firm earn when a customer does not take the discount? Without doing any calculation, explain what will happen to this affective rate if:
a. The discount is change to 3 percent.
b. The credit period is increased to 60 days.
c. The discount period is decrease to 20 days.
d. What is the EAR for each Scenario?